Why does my grundle have a unique odor? It doesnt smell like my
armpits or anywhere else on my body for that matter... I dare to ask
the question... WHY?

I must be an idiot...what's a grundle?  I'm almost scared to ask.

Since this is under Men's health, I'm guessing I know what you're
talking about. The reason is that in that area you have an abundance
of ceruminous glands, which secrete a waxy-like substance that
bacteria love. (Normal sweat is just water and electrolytes, which
bacteria can't grow on.) You do have these ceruminous glands in your
armpits as well, but not as abundant. So that's why those two areas
are much more prone to stinking than other areas on your body, but I'm
guessing the abundance of the glands in the pubic area causes the
difference in smell.

Actually, the armpits and pubic area have apocrine sweat glands which
is what you are talking about.  Ceruminous glands are actually
modified apocrine glands, but are located only in the ear, and produce
cerumen, which is earwax.  The odor associated with apocrine glands is
a product of the bacterial digestion of their secretions.  I would
surmise that the mix of bacteria is different in the two areas,
resulting in different metabolites of the digestive process, which
results in different odors.

The plot thickens.... intriguing... please tell me more about these
bacteria and secretions...

Yeah, thanks for the clarification. I haven't had anatomy in a couple
years, so I forgot that they're actually apocrine glands. "Ceruminous"
is just such a cool word though.... Anyway, the only other thing I
know is that butyric acid is one of the by products that stinks. I
think it is cleaved from an ester, but I don't remember exactly. Also,
maybe the difference is that you just need to wash in that area more
than you do in your pits? I dunno.

According to Wikipedia, "grundle" is slang for perineum.

http://en.wikipedia.org/wiki/Perineum